C/math.h/nearbyint

    
//Declaration: float nearbyintf(float arg); 
               double nearbyint(double arg); 
               long double nearbyintl(long double arg);  
 
    
  
  #include <math.h>
  #include <stdio.h>
  int main(void)
  {
     double f;
     f = nearbyint (2.3);
    
     printf("%f " , f);
  }
         
        /*
        2.000000
        */